Airworthiness Directive 47-11-01
one-timeAirworthiness Directives; Navion Serial Numbers NAV-4-2 to NAV-4-550, Inclusive
Which aircraft AD 47-11-01 applies to
Applies only to serial numbers NAV-4-2 to NAV-4-550, inclusive. To be accomplished immediately: remove present rudder-nose gear system (text truncated); covered by North American Service Bulletin No. 21, dated January 23, 1947. Military designation Army L-17A.
Whether AD 47-11-01 actually applies to your aircraft (by serial and installed parts) and whether it’s already complied with comes from that aircraft’s records.
How AD compliance is recorded
A valid compliance record (14 CFR 43.9) states:
Tailplate reads a tail number’s logbooks and matches every applicable AD — including this one — to its compliance evidence, with recurring next-due dates computed.
Look up a tail number →Applicability is derived from the FAA directive corpus and is advisory, not a legal airworthiness determination. Compliance is established only from an aircraft’s actual records.